alkaline phosphatase: meaning, definition, pronunciation and examples
RareTechnical/Scientific
Quick answer
What does “alkaline phosphatase” mean?
A hydrolase enzyme that removes phosphate groups from molecules by cleaving phosphoric acid monoesters into a phosphate ion and a molecule with a free hydroxyl group, functioning optimally at an alkaline pH.
Audio
Pronunciation
Definition
Meaning and Definition
A hydrolase enzyme that removes phosphate groups from molecules by cleaving phosphoric acid monoesters into a phosphate ion and a molecule with a free hydroxyl group, functioning optimally at an alkaline pH.
An enzyme found in many tissues, but with particularly high levels in the liver, bile ducts, bones, and placenta. It's commonly measured in blood tests as a biomarker for liver and bone health, with different isoenzymes indicating different tissue origins.
Dialectal Variation
British vs American Usage
Differences
No lexical or orthographic differences. Pronunciations may differ slightly, particularly stress in 'phosphatase' (/ˈfɒs.fə.teɪz/ vs /ˈfɑːs.fə.teɪs/).
Connotations
Identical technical connotations in medical and scientific contexts.
Frequency
Equally rare outside specialised fields in both varieties.
Grammar
How to Use “alkaline phosphatase” in a Sentence
The doctor ordered a test for {alkaline phosphatase}.An elevated {alkaline phosphatase} can indicate...The {alkaline phosphatase} level was measured.Vocabulary
Collocations
Examples
Examples of “alkaline phosphatase” in a Sentence
verb
British English
- The enzyme will alkaline phosphatase the substrate.
- We need to alkaline phosphatase the sample.
American English
- The enzyme will alkaline phosphatase the substrate.
- We need to alkaline phosphatase the sample.
adverb
British English
- The reaction proceeded alkaline phosphatasely.
- The sample was treated alkaline phosphatasely.
American English
- The reaction proceeded alkaline phosphatasely.
- The sample was treated alkaline phosphatasely.
adjective
British English
- The alkaline phosphatase activity was high.
- An alkaline phosphatase assay was performed.
American English
- The alkaline phosphatase activity was high.
- An alkaline phosphatase assay was performed.
Usage
Meaning in Context
Business
Not used.
Academic
Core term in biochemistry, medicine (especially hepatology and orthopaedics), and related life sciences.
Everyday
Virtually never used; a patient might encounter it on a medical report.
Technical
Precise term for a specific diagnostic marker and enzyme studied in molecular biology.
Vocabulary
Synonyms of “alkaline phosphatase”
Vocabulary
Antonyms of “alkaline phosphatase”
Watch out
Common Mistakes When Using “alkaline phosphatase”
- Misspelling as 'alkeline phosphatase' or 'phosphotase'.
- Incorrect pronunciation with stress on the first syllable of 'phosphatase' (e.g., /'fɒs.feɪ.teɪz/).
- Using it as a countable noun without an article (e.g., 'He has high alkaline phosphatase' vs '...high *levels of* alkaline phosphatase').
FAQ
Frequently Asked Questions
A high level often indicates liver disease (like bile duct obstruction) or bone disorders (like Paget's disease or growing bones in children). Further tests are needed to pinpoint the cause.
No. ALT and AST are different liver enzymes that indicate hepatocellular injury (damage to liver cells). Alkaline phosphatase is more associated with bile flow problems (cholestasis) and bone turnover.
Yes, though less common. Low levels can be seen in conditions like hypophosphatasia (a genetic disorder), malnutrition, or certain nutrient deficiencies (e.g., zinc, magnesium).
It is named for its optimal pH range. This enzyme functions most efficiently in a basic (alkaline) environment, typically around pH 8-10, unlike its counterpart, acid phosphatase.
A hydrolase enzyme that removes phosphate groups from molecules by cleaving phosphoric acid monoesters into a phosphate ion and a molecule with a free hydroxyl group, functioning optimally at an alkaline pH.
Alkaline phosphatase is usually technical/scientific in register.
Alkaline phosphatase: in British English it is pronounced /ˌæl.kə.laɪn ˈfɒs.fə.teɪz/, and in American English it is pronounced /ˌæl.kə.lɪn ˈfɑːs.fə.teɪs/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “None”
Learning
Memory Aids
Mnemonic
Think of a 'line' of Alkali (high pH) that helps Phosphate 'ase' (an enzyme) break things apart. 'Alkaline Phosphatase' = A Line for Phosphate-Ases.
Conceptual Metaphor
NONE. It is a purely technical, literal descriptor.
Practice
Quiz
Alkaline phosphatase is primarily used as a clinical marker for conditions affecting which two systems?